Browse Standards J3138
WIP 2012-01-17

Guidance for securing the Data Link Connector (DLC) J3138

On-Board Diagnostic (OBD) regulations require passenger cars, and light and medium duty trucks, to provide a Data Link Connector to support communication of diagnostic information to off-board devices. Legislated diagnostic information is also required to be communicated in a timely fashion to the off-board devices. Many vehicle manufacturers also provide access to enhanced diagnostic information and vehicle systems/subsystems via this connector. Generally, there are two forms of communication methodologies used in current vehicles: a. Open access to communication busses b. Communication busses isolated via a gateway This document provides guidelines for securing communications with any off-board device for vehicles utilizing either methodology.
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